Behind them, on a desolate patch of sidewalk, Stephanie Long tried to revive her dying daughter, shot once in the chest during a botched purse snatching.

Police were en route, but surveillance video from that January night shows the dark Chevy Impala already long gone - a left on Frankford, another on Girard, still another on 12th, where Stephanie Long's cellphone was found near a dark side street off Girard.

The Impala and its passengers were last seen on video speeding toward Center City.